Which statement is true about GSM roaming?

• A. It is impossible to roam internationally with GSM.
• B. Roaming is only available within the same country.
• C. International roaming requires specialized hardware not common in GSM phones.
• D. The widespread GSM standard enables international roaming between operators.

Answer: (D)

GSM roaming is built on international operator agreements that let a device use a foreign network while you travel. Because GSM was designed as a global standard with roaming in mind, your phone can connect to partner networks abroad and be billed by your home operator, letting you make calls, send texts, and use data just as you would at home.

That’s why the statement about the widespread GSM standard enabling international roaming between operators is the best answer—it reflects how GSM networks interwork across borders today. You don’t need special hardware beyond a compatible phone and an activated roaming service; the home and visited networks handle authentication and billing through established roaming arrangements.

The other options conflict with how GSM works: roaming internationally is indeed possible; it isn’t limited to within the same country; and modern GSM phones don’t require specialized hardware to roam.